ORR Activity and Direct Ethanol Fuel Cell Performance of Carbon-Supported Pt−M (M = Fe, Co, and Cr) Alloys Prepared by Polyol Reduction Method

“…Toda et al [146] reported that oxygen adsorption increases in the case of changing of the electronic structure of Pt induced by a transition metal, and then the O-O bond is weakened. For this purpose, various platinum-based bimetallic catalysts, such as Pt-Ni [147,148], Pt-Co [149,150], Pt-Fe [151,152], Pt-Cr [153,154], Pt-Cu [155,156], Pt-V [157,158], Pt-Mn [159], Pt-Bi [35], Pt-Te [160] have been reported. It can be clearly emphasized that modified-platinum catalysts display 1.5-3 times higher catalytic activity than that of pure platinum catalyst.…”

Section: Orr Activity On Various Carbon Supported Nanoparticles Prepamentioning

confidence: 99%

“…Indeed, this peak is centered at 0.70 V vs. RHE on Pd/C-ETEK; 0.72 V vs. RHE on Pd/C-CH2O, 0.74 V vs. RHE on Pd/C-NaBH4 and 0.74 V vs. RHE on Pd/C-EG. Rao et al [152] reported Pt and Pt-M (M: Fe, Co, Cr) alloy catalysts prepared by the polyol method in 1,2-hexadecanediol in the presence of nonanoic acid and nonylamine as protecting agents. The results of linear sweep voltammetry indicated that the Pt alloy catalysts exhibited 1.5-1.7 times higher oxygen reduction activity than that of the as-synthesized and commercial Pt catalyst.…”

Section: Orr Activity On Various Carbon Supported Nanoparticles Prepamentioning

confidence: 99%

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

et al. 2015

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Abstract:The oxygen reduction reaction (ORR) is the oldest studied and most challenging of the electrochemical reactions. Due to its sluggish kinetics, ORR became the major contemporary technological hurdle for electrochemists, as it hampers the commercialization of fuel cell (FC) technologies. Downsizing the metal particles to nanoscale introduces unexpected fundamental modifications compared to the corresponding bulk state. To address these fundamental issues, various synthetic routes have been developed in order to provide more versatile carbon-supported low platinum catalysts. Consequently, the approach of using nanocatalysts may overcome the drawbacks encountered in massive materials for energy conversion. This review paper aims at summarizing the recent important advances in carbon-supported metal nanoparticles preparation from colloidal methods (microemulsion, polyol, impregnation, Bromide Anion Exchange…) as cathode material in low temperature FCs. Special attention is devoted to the correlation of the structure of the nanoparticles and their catalytic properties. The influence of the synthesis method on the electrochemical properties of the resulting catalysts is also discussed. Emphasis on analyzing data from theoretical models to address the intrinsic and specific electrocatalytic properties, depending on the synthetic method, is incorporated throughout. The synthesis process-nanomaterials structure-catalytic activity relationships highlighted herein, provide ample new rational, convenient and OPEN ACCESSCatalysts 2015, 5 311 straightforward strategies and guidelines toward more effective nanomaterials design for energy conversion.

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“…Well-defined hydrogen desorption and adsorption peaks in the potential range of -0.05 to +0.3 V, and irreversible pre-oxidation and reduction peaks in the potential range of +0.5 to +1.0 V were observed. The electrochemically active surface area (EAS) was determined by assuming that a monolayer of adsorbed hydrogen requires 210 μC/cm 2 for its oxidation [12]. The EAS was then calculated using the following equation [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electrochemical analysis of Pt-loaded, polypyrrole-decorated, graphene-composite electrodes

Park¹,

Kim²

2013

Carbon letters

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In this study, an electro-catalyst of Pt nanoparticles supported by polypyrrole-functionalized graphene (Pt/PPy-reduced graphene oxide [RGO]) is reported. The Pt nanoparticles are deposited on the PPy-RGO composite by chemical reduction of H2PtCl6 using NaBH4. The presence of graphene (RGO) caused higher activity. This might have been due to increased electro-chemically accessible surface areas, increased electronic conductivity, and easier charge-transfer at polymer-electrolyte interfaces, allowing higher dispersion and utilization of the deposited Pt nano-particles. Microstructure, morphology and crystallinity of the synthesized materials were investigated using X-ray diffraction and transmission electron microscopy. The results showed successful deposition of Pt nano-particles, with crystallite size of about 2.7 nm, on the PPy-RGO support film. Catalytic activity for methanol electrooxidation in fuel cells was investigated using cyclic voltammetry. The fundamental electrochemical test results indicated that the electro-catalytic activity, for methanol oxidation, of the Pt/PPy-RGO combination was much better than for commercial catalyst.

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ORR Activity and Direct Ethanol Fuel Cell Performance of Carbon-Supported Pt−M (M = Fe, Co, and Cr) Alloys Prepared by Polyol Reduction Method

Cited by 75 publications

References 38 publications

Highly stable PtP alloy nanotube arrays as a catalyst for the oxygen reduction reaction in acidic medium

Highly stable PtP alloy nanotube arrays as a catalyst for the oxygen reduction reaction in acidic medium

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

Synthesis and electrochemical analysis of Pt-loaded, polypyrrole-decorated, graphene-composite electrodes

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